Hi! I have not seen this topic and created my own crash error theme on unreal 5.7.1. There I tried to explain the occurrence of the error in as much detail as possible. I attached screenshots and a log file.
I’ve experimented on two different computers with different drivers, and the result is the same everywhere.
after updating the project from 5.6 to 5.7, I get the following crash during level loading.
I started experimenting to understand: I created a new empty black level. I connected a sub-level there, in which datasmith urban buildings are low-poly and rvt. Everything connected, I added direct light - ok, but as soon as I added Sky Light - the same error pops up.
All these objects and materials worked without problems in unreal 5.4, 5.5, 5.6. I continued to delete objects one at a time. I’ve deleted almost everything, leaving only one building and a master plan. Skylight is added, but after 30 seconds the scene crashes with the same error.
The second scene with other buildings loads without problems.
I created another black level and started adding several datasmiths to the scene in turn, and eventually unreal crashed with the same error.
I keep looking for the cause of the error: I created a new clean unreal 5.7.1 project, downloaded the latest Datasmith plugin, and re-transferred lowpoly at home from 3dsmax to the new Unreal project. The 3dsmax objects are made by the RailClone plugin, Datasmith import to Unreal as HISM. Everything was exported, but after Skylight - Unreal was created, it crashed with the same error. I just imported the same Datasmith file into Unreal 5.6 and it imported without errors and with Skylight lighting.
